Looks like white snakeroot seedlings to me, a variety of eupatorium.

Howdy,

This looks like Blackberry to me. A very pervasive, fast growing shrub with stickers. I'm about 99% sure of that.

Try and pull them up with as many of the roots as possible. Then get some round up or some kind of weed killer to kill the remaining roots.

Also, a heavy brush killer sprayed on the leaves will do the trick. Just be careful not to spray any other type of surrounding (desirable) plants.

ia

Here is a link that might be useful: Blackberry (disambiguation)

Thanks for the replies. Whatever it is, I've pulled it up everywhere, except for a small isolated section where I plan to let it grow a bit, and see what happens.

It's not altogether unpleasing in appearance.

I have noticed that as it ages, the leaves are getting longer, and more arrow like in appearance. I'l try to take an update pic and post.

Thanks again!

Does anyone else have any thoughts on this?

For some reason, I don't think it's Blackberry. The leaves look different from the pictures I've been able to find.

This stuff is popping up everywhere... in the middle of some juniper, in the middle of established groundcover... and it definitely seems to regenerate from any root pieces I leave behind.

A characteristic I forgot to mention before- sometimes when pulling on the stem, the outer stem covering will pull off, leaving behind a thin green "thread" from the inside.

Tenacious little buggers. Grrrrrr.